I prefer the M&P over the XDM. Grip is more comfortable and natural for me. I can shoot both about the same accuracy wise, but much more comfortable with the Smith & Wesson. The odd hard-primer (ammo problem), but besides that no malfunctions in about 8000 rounds through the M&P. I generally shoot 147gr or 115gr. Both are ok, but I find it likes 115gr more for whatever reason. Havent put enough 124gr through it to give a good opinion. M&P mags can be hard to come by, but once you get them (and sand the follower so that it loads 10 on a closed slide), the mags should last for a very long time. Just clean and maintain them. So far I have no signs of wear, and each mag has seen well over 1500 rounds each.